Background
Beresford was the third son of the Henry Beresford, 2nd Marquess of Waterford and his wife, Susanna.
Beresford was the third son of the Henry Beresford, 2nd Marquess of Waterford and his wife, Susanna.
He was educated at Eton and Trinity College, Cambridge.
John Henry de la Poer, Earl of Tyrone, later 5th Marquess of Waterford (1844–1895)
Lord Charles William de la Poer (1846–1919), later created Baron Beresford, naval commander
Lord William Leslie de la Poer (1847–1900), soldier
Lord Marcus Talbot de la Poer (1848–1922), equerry
Lord Delaval James de la Poer (1862–1906), soldier.